Don't see them either buying some arts directly to an artist. The one I mostly see here is they are always running a contest where many artist join and try to win those appealing prizes offered by their management.
Also Nft of those art piece submitted before has been discuss but there's no feedback on roobet side if this will happen since maybe they are avoiding something that can distract or disturb their operation so I guess they are not really have a plan to create a NFT with those submissions of their art contest participants.
If I'm not mistaken it was happen on the last year, but now I don't see they're want to buy the physical art, although I don't know how much they want to buy it. It seems Roobet isn't a casino where they will follow the latest crypto trend, they just want to improve their current site, launch many unique promotions and looking to sign many players or celebrities to become their brand ambassador.